Modelling Techniques for Underwater Noise Generated by Tidal Turbines in Shallow Waters

Conference Paper

Title: Modelling Techniques for Underwater Noise Generated by Tidal Turbines in Shallow Waters
Publication Date:
June 24, 2011
Conference Name: 30th International Conference on Ocean Offshore and Arctic Engineering
Conference Location: Rotterdam, The Netherlands
Pages: 1-9
Publisher: ASME
Stressor:
Technology Type:

Document Access

Website: External Link

Citation

Lloyd, T.; Turnock, S.; Humphrey, V. (2011). Modelling Techniques for Underwater Noise Generated by Tidal Turbines in Shallow Waters. Paper Presented at the 30th International Conference on Ocean Offshore and Arctic Engineering, Rotterdam, The Netherlands.
Abstract: 

The modelling of underwater noise sources and their potential impact on the marine environment is considered, focusing on tidal turbines in shallow water. The requirement for device noise prediction as part of environmental impact assessment is outlined and the limited amount of measurement data and modelling research identified. Following the identification of potential noise sources, the dominant flow-generated sources are modelled using empirical techniques. The predicted sound pressure level due to inflow turbulence for a typical turbine is estimated to give third-octave-bandwidth pressure levels of 119 dB re 1 μPa at 20 metres from the turbine at individual frequencies. This preliminary estimate reveals that this noise source alone is not expected to cause permanent or temporary threshold shift in the marine animals studied.

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